If you have an Amazon Alexa device, you can enable a feature called Alexa Guard. The device will listen for breaking glass and smoke detector alarms. If it hears either, it will send a push notification to your phone to let you know. I played a breaking glass sound effect and pushed the smoke detector test button to try it out. It notifies your phone, and lets you listen in to hear what's happening in your house.
Obviously not the same as a full security system. But a cheap way to let you know that something might be going on.